Working ladder



FIG. 1 is a left view showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a front perspective view thereof;

FIG. 7 is a rear perspective view of the working ladder with the lower step flipped over the upper step;

FIG. 8 is a front perspective view of the working ladder when folded; and,

FIG. 9 is a front perspective view of the working ladder with the handle frame raised. 

CLAIM The ornamental design for a working ladder, as shown and described. 